题干

在双缝干涉实验中,图甲是用绿光进行实验时,屏上观察到的条纹情况,a处为中央亮条纹,图乙是换用另一种颜色的单色光进行实验时,屏上观察到的条纹情况,a处仍为中央亮条纹,则以下说法中正确的是(    )

A:图乙可能是用红光实验产生的条纹,表明红光波长较长

B:图乙可能是用紫光实验产生的条纹,表明紫光波长较长

C:图乙可能是用紫光实验产生的条纹,表明紫光波长较短

D:图乙可能是用红光实验产生的条纹,表明红光波长较短

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A

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